18312730010917 has 2 divisors, whose sum is σ = 18312730010918. Its totient is φ = 18312730010916.

The previous prime is 18312730010899. The next prime is 18312730011007. The reversal of 18312730010917 is 71901003721381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9727824150916 + 8584905860001 = 3118946^2 + 2930001^2 .

It is a cyclic number.

It is not a de Polignac number, because 18312730010917 - 2³¹ = 18310582527269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18312730010117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9156365005458 + 9156365005459.

It is an arithmetic number, because the mean of its divisors is an integer number (9156365005459).

Almost surely, 2^{18312730010917} is an apocalyptic number.

It is an amenable number.

18312730010917 is a deficient number, since it is larger than the sum of its proper divisors (1).

18312730010917 is an equidigital number, since it uses as much as digits as its factorization.

18312730010917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 18312730010917 in words is "eighteen trillion, three hundred twelve billion, seven hundred thirty million, ten thousand, nine hundred seventeen".